Insulator for high-tension conductors.



FENTED FEB. 25, 1908.

2 SHEETS-SHEET l.

if M

f4 TTOHNEYS SAM "EL HENRY SUMMER-SCALES, OF WIN IPEG, MANITGBA, CANADA.

.Specification of Letters Fatent.

Patented Feb. 25, 13.90%.,

ipplicsiou filed November 2S. 1.906. Serial No. 344,705.

'dem 'i5 muy concern:

town tdi-it l4 toni, HENRY SUM- oi th Yging; of Greet i ni, 1nd a resident oi lPiinnnpeg, in the ci suitohs und oininion o' CA invented e new und improved .ln-

li 'lcnsirn '1"onductors, oi". e, einer, end elect :adopted to he used for insulating ou coY doctors such es used in elecpurpose of the inven- :unq rent i'or virtu- Y oi' the path oi leuk- "onductor to the' erin, and,

rrengenient 'for pre- ;'Z possihlc, the leakage .v-hicn l h); the presence oi weiter around Y w nv weather.

fr` t. r M i "Ny, L" 7.7 4'

i ne no entren consi onstiuccion zo nation oi pin einsiter :ind particularly l'orth i to he had to the accon'ipany rsivings 'forming s part of this specifico.-

h siniilsr cheres" irs or reference in slltl on of s portion of en erm orovided with in insuintorconstructed invention; the conductor ection; Fig. 2 is side .i t mtor und comluetor, the end elevation; Fig. E plsu oi the mijn end insulator; Fi, Li is i lion teiten on the line 4*@ of i ig.

especiullja the coi'istruction. o. oi ne insulator und the manner of tl conductor thereto; Fig. 5 a' 'tion on the line 5 5 ol' Fig. 3 and er iilustrstingr the nisnner of attaching th. e nduetor to the insulator hody end the nienner oi ettsching the insuietor hody to the g iii( 6 is s perspective oi' the vinsulator is s perspective of s shield which v l tutes e feature of the invention; and Fig. 9 is s perspective of another guard plate which also constitutes s feature of the invention.

Referring more particularly to the parts, and especially to Figs. l, 2 and 3, l represents the nrxn or pole upon which the insulator '2 is mounted. This insulator cornprises s hody 3, oi glass, porcelain or similar insulating mute-rial; it is of substantially pyron'iidsl forni, the apex vof `the pyramid being out sway so :is to form s The insnner of attaching this hase to the arm is clearly shown in Fig. 4 5 for this purpose the urni is provided with s block 4 which constitutes u sost upon which the lower fece of the insulator rests, as indicated. Upwsrdly through this hlocli fastening devices or bolts 5 extend, the upper extremities of the seid bolts heilig formed into enlarged screws 6 which are threaded into the hose of the insulstor hody, :is shown. As indicated in 3, the insulator body is elongated in the direction in which the erin extends. On the vided, which may he tivo in number es shown. These grooves are foriued in s vertical plane and have extensions 8 et their sides which extend downwardly from the inclined side feces 9b of the insulator body es shown in Fig. 6. On the side faces 9b, hori- Zontel longitudinally disposed grooves l are provided, and these are also preferably two in number, :is indicated. 'lhese grooves preferably incline upwardly towrd the interior of the lood y es shown in Fig. 5.

Aty the upper portion of the hody 3 e Seat l1 is fornied for s conductor l2, and the conm struction of this sont and the nmnncr of ettachingr the conductor thereupon will he described more fully licreiruifter. lt 'will sppeur, however, that the grooves 7, together with their branches S, are disposed in verti conductors. ln these grooves src mounted shields lf3 and 14, the shields i3 being ot' suhsts-ntially elliptical or oval form, of larger dimension than the shields le, and disposed to the conductor. Une ol these shields 13 is very clearly shown in Fig. 7; in its lower edge s notch l is formed which is adapted to he received in the upper groove 7, the side edges i6 of the notch lying in the branches S of the l sroove. The shields 14 are similarly formed inclined or endfaces (la, grooves 7 are pro-` in the grooves 7 which nre disposed nearest cel planos; that is, they are parallel with the ig. 7. At their upper ends these groovescut into the upper portion of the notch 15, as shown. In their lower edges these grooves 17 are provided with small notches `or re cesses 18, having inclined upper faces and abrupt rear faces, as shown. Similar grooves 19 are provided in the lower portion of these shields or plates, and the lower edges of these grooves are similarly provided with notches 20 as shown. 20 On the inner faces of the outer shields 1 4, grooves 2,1 are provided, which are similar to the grooves 19 just described, and in substantially the Sande plane therewith. From this arrangement, it will be understood that when the shields are applied to the insulator body, as indicated in Big. 1, the grooves 17 of the two shields 13 will lie opposite to each other. These grooves afford means for attaching sheds 22. The construction of one it consists simply of a plate of substantially rectangular forin, having a longitudinally disposed rib or tooth 23 which extends along the under side thereof. These sheds are adapted to be applied with their side edges received in the grooves 17, and are adapted to be passed upwardly until rtheir upper edges are seated 1n the upper ygrooves l 0. At th` -ir outer edges, each of the sheds 22 is ro- A vided witha longitudinally disposed ri or tooth 24. lt should be understood, also that when the shields are all in position, the grooves 21 will corne opposite to each other so as to facilitate the attachment of undersheds 25. The construction of one of these under-sheds is very clearly shown in Fig. 9,

it presents an elongated plate 26 which is provided with a pair of parallel slots 27 which extend'into the interior of the late from the forward edge 23 thereof. 0n the under side, this under-shed is provided with a longitudinally disposed rib 29 which is siniilar to the rib 23 referred to above. On its under side, this under-shed is provided with an upwardly projecting apron 30, which simply consists of a downwardly tapered flat late formed integrally with the plate 26.

he upper portion of this plate 30 is of enlarged thickness, as shown, so that the lower portion of the plate presents a reduced fin 31,

and adjacent to the point of connection between this iin and the body of the plate, downwardly. projecting undercut shoulders 32,/are/forrned. The under-sheds 25 are G5/adapted to be applied asindicated, with the of these sheds is shown very clearly in Fig. 8

" conductor 12 must end edges thereof received in the ooves 21; they are then forced inwardly, t e slots -27T engaging the grooves 19. The inner edges 28 of the under-sheds eventually seat in the llower grooves 1() of the insulator body. 70

When the sheds 22 are pushed into position in the manner described, the ribs 23 thereof,

at their ends, engage in the notches 18. i in. this connection, attention is called to the fact that the ribs 23 present abrupt rear faces 7.5 and inclined forward faces, so that when they' come into the notches, .they revent the sheds from shifting downward y from the position in which they are represented; likewise, the ribs 29 at the slots 27 engage the L3@ notches 20 of the grooves 19 so as to prevent a downward shifting of the under-sheds. Similar notches are provided in the corren sponding grooves 21 of the shields 11i.' Both faces of the shields 13 and 14 are provided g5 with longitudinally extending horizontal ribs 33, and these ribs are formed with inclined upper faces and substantially horizontal lower faces or shoulders 34. In addition to this, the edges of the shields are formed 'y with grooves 35 which extend continuously around them.

In order to form the'seat 11, the insulator body 3 is forined with a longitudinally eX- tending channel or gutter 36 in the uppeng side thereof, so that two oppositely disposed ribs 37 are formed. These ribs are formed with oppositely disposed grooves 38 which aline with each other to receive the conduc tor 12 in the manner indicated. ,1an

I provide means for holding the conductor' in the notches or recesses 33, for which purpose the upper ortion of the insulator body 1s provided wit 1 a bolt 39. The lower portion of this bolt is formed into an enlarged screw L10, which is threaded into the upper portion of the insulator body, and the upper extremity of the bolt projects above the in sulator body to receive a nut 41; this nut affords means for attaching a saddle 42 which engages the upper side of the conductor between the ribs 37 and which, by means of the nut L11, may be clamped upon the conductor, as will be readily understood. y

The shields 13 and 14 and the sheds and 115 under-sheds are formedof'a dielectric niaterial, so that the ath of leakage from the lie around the edges of the shield. ln this way, ther virtual distance from the conductor to the insulator arm is much increased. By reason of the pyramidal form of the insulator, the water which falls upon the insulator is quickly shed therefrom.' By reason of the grooves 35 in the edges' of the shields, the water which falls upon the edges of the shields is carried down the edges so that there is a tendency to keep the side faces of the shields free from moisture. The rojecting ribs 33 presenting, as they do, the orizontal protected shoulders 34, tendjft@ 1361 essere of theJsheds and under-sheds tends to bring about the saine desirable result os that just referred to, and attention is called, also, toA

the shoulders 32 of the under-sheds which Will renifain dry. It Will be observed, also, that the fins 31 of the under-sheds project downwsrdly op osite tothe metallic bars la i and lb of Whic the insulutin arrn muv be Isol constructed as shown. In this Way they/uoperate to increase the length of the path of lines of lee-liu e which can pass around the outer edges o the upper plates 26 ofthe under-sheds.

S ecial sttention is called to the manner in iynich the shields and the sheds and under sheds are mounted onsthe insulator body, Without necessitating the employment of lastoning devices of an sort on account of the.

construction used, t e parts hold themselves in osition upon the insulator body.

t should be understood 'hat the plates 'lit' tight in their grooves so as toexclude the waterststhese points. In this Way it becomes 'impossible' for 'a- Waterrilm to collect and "forma short circuit us it were, under'the` edge of a plate. Ii'it is not feasible to form Watentight joints as suggested, this may be accomplishednbyfany Well known method I such as by applying a coating of water-proofk.between scid shields.y

Vin materiel or'cement.

avirog thus described. my invention, I- :40.

nclsirn as new Patenti 1. 'An insulator presenting a body adapted to be mounted upon a support, land having and desire to secure by lLetters shields disposed on opposite sides of the ccn- `ductor, said shields eing formed of dielec- 2. An insulator having a body adopted to 'be mounted upon support, und shields at tached to said bod,v in the path of lines of 'leakage which mig t pass to seid support,

seid shields having projecting portions adapted to prevent the formation' ci s conf tinuous costing of water on. seid shields.

3. An insulatorhaving e body edeptedy to be mounted u on s support, shields mounted upon seid bo y on opposite sides of the conductor und presenting ribs extending longitudinelly thereof, seid ribs presenting protected. under reces adapted to prevent the uceursulation of water, end sheds disposed e.. eninsulstor having e body adapted to be ino-tinted upon asupport, an having substantially parallel shields of dielectric material mounted thereupon, and sheds udapted to interlock with said shields, said sheds and said shields boing adapted to intercept the lines of leakage from the conductor to the said support.

5. An insulator having a body adapted to be mounted upon a su port and presenting a substantially pyrainiditl torni with grooves in the faces thereof, shields attached in said grooves and adapted to interceptl leakage currents passing across them toward said support. Y

6. An insulator having a body of substantially pyramidal forni adapted to be mounted. u on a support and presenting grooves in the faces thereof, shields mounted in said grooves and adapted to intercept leakage currents passing from said conductor to said support, said shields being dis osed in substantially parallel relation, an sheds sind under-sheds disposed be tween said shields and interce ting leakage currents tending to pass on t e surface oi said body longitudinally with respect to said conductor toward said support. f

7. An insulator having u body of substantially pyrarnidal forni adopted to be mounted. u on a support and presentin@ grooves in t e faces thereof, shields mounts( in said grooves and vadapted to intercept leakage currents passing from said conductor to seid support, said shields being disposed in substantially parallel relation, sheds and under-sheds disposed between seid shields und intercepting leakage cure rents tending to ess on the surfaceoi said body longitudine y With respect to said conductor toward said support, said undersheds having downwardlyprojecting aprons dis osed opposite the said support whereby lea rage to said support is prevented around the lower edges of said under-sheds.

8. An insulator having u body adopted to be mounted upon s support, shields mounted upon said body substantially parallel with the direction in which the conductor 'eso tends, under-sheds sttached between said shields and having downwardly extending aprons disposed opposite said support, undensheds being adapted to prevent the leakage currents passing scross the surface .ci said body longitudinally with respect to .seid conductor, seid shields being adapted tp prevent the lleakage of currents passing across the surface or" said body laterally from seid conductor.

9. insulator having a substantially .yrainldsl body adapted to sest upon a sup-- port, seid body having grooves in feces thereof, shields mounted in said grooves ond disposed substantially parallel with e. ductor, seid shields being arranged upper pair end a lower pair, the up otsnieldshaving grooves on their i... -ff

Je v 880,418

faces, sheds received in said grooves and enleakage currents passing across the surface 10 gaging said body at the, upper edges thereof, of said Ybody laterally from said conductor. the lower pair of said shields having grooves In testimony whereof I have signed my on theiradjacent faces', lunder-sheds engagname to this speoiiication in the'presenoe of4 ing said last grooves, said sheds and undertwo subscribing Witnesses.

sheds being adapted to cut off leakage curl SAMUEL HENRY SUMMERSCALES. rents passing across the surface of saidlqody' Witnesses: longitudinally with respect to said 1con- E. H. EVANE,

ductor, said shields being adapted to out off O. P. LAMBOURNE. 

